Safety-valve.



E. B. GOLD.

SAFETY VALVE. APPLIOATION FILED 00125. 1907.

909,886. Patented Jam 19, 1909.

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EDWARD E. GOLD, OF NEW YORK, N. Y.

SAFE TY-VALVE Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed October 25, 1907. Serial No. 399,130.

To all whom it may concern:

Be it known that I, EDWARD E. GOLD, a citizen of the United States,residing in the borough of Manhattan, city, county, and State of NewYork, have invented certain new and useful Improvements in Safety-Valves, of which the following is a specification.

This invention relates to valves, and aims especially to provide animproved automatic relief valve for car heating systems. In my PatentsNos. 563,371, of July 7, 1896, and 661,603, of November 13, 1900, I haveshown valves s eciall designed for such use and in which t he va veproper or valve body is made of a ball or block of yielding material, oris a compound member with a facing of relatively unyielding material anda backing of relatively yielding material. My present invention providescertain features of improvement specially adapted for this class ofvalves as well as certain features which may be used with valves ofother design.

Where the valve body has been depended upon entirely to provide theyielding efl'ect, its efficiency diminishes in the course of time, sothat it requires to be renewed. In order to keep it tight upon its seatthe trainman presses it down harder and harder as it loses itsresiliency, so that there is danger of a point being reached at which itwill fail to open to the determined pressure, and an explosion is liableto result. According to the present invention the ball or block ispressed against the seat by means of a spring of at least as great andpreferably greater stiffness, instead of by the rigid threaded devicesused with previous constructions. In case the material of the ball hasso far lost its elasticity as to fail to respond to the desiredpressure, the spring referred to will respond to a slightly greaterpressure, and explosion or other damage will thus be avoided. Thefailure to renew a ball after it has lost its resiliency will nottherefore be attended with such serious results. In fact the valve maybe used until the ball is so distorted that, although the adjustingscrews are turned as far as possible, the ball will cease to close theopening. Thereupon a new ball will be inserted and the parts adjusted totheir outermost position.

The accompanying drawings illustrate an embodiment of the invention.

Figure 1 is a perspective view of a complete valve. Fig. 2 is a verticalsectional view of the same.

Referring to the embodiment of the invention illustrated, the ball orblock may be of the composition described in my later patent abovereferred to; that is, with a facing member A of semi-yieldingcomposition such as Jenkins packing material, and with a backing memberB of rubber or similar elastic material; the two parts being cemented orotherwise fastened to each other, and the upper part B being formed witha socket C which receives a guiding projection or pin D of the holder soas to prevent displacement of the ball. The ball seats upon a valve-seatE having a threaded extension F by which it is screwed into the upperend of a pipe or other member to which the complete valve is to beattached. lhe inner holder G fits the upper part of the valve body andforces it against the valve seat to hold the valve closed with apressure depending upon the composition of the parts A and B of theball, and upon the position of adjustment to which the holder G is set.

An outer holder H is provided, and has formed therein a cylindricalrecess J in which a cylindrical portion K of the inner holder is fittedto slide vertically. The outer holder H is provided with a hollowextension L carrying a sprin M which surrounds a stem N on the top ofthe inner holder G and which presses against the top of the innerholder.

The valve-seat E is provided with a flange O, and the outer holder Lwith a corresponding flange P, and these flanges are forcibly broughttoward each other by means of screws Q screwing into In s R upon thevalve-seat flange. Spacers S are arranged between the two flanges, asintegral extensions from the flange P, for example.

The spring M is made substantially stronger than the more elastic memberB of the ball, and the spacers S are of such length as to leave acertain amount of play between the parts, so that the valve may alwaysopen under an excess of pressure. As the pressure for which the valve isto be set is raised, or as the efficiency of the more elastic part B ofthe ball diminishes, the outer holder H is adjusted toward the valve byturning the screws Q. The movement of the outer holder, through thestiff spring M, elfects a movement of the inner holder and a turthercompression of the ball so that the latter presses more firmly.

on the valve seat. When the ball has so deteriorated that it isnecessary to adjust the holder to the limit allowed by the extensions S,a new ball is substituted and a new ade justment effected.

V The pin D of the inner holder substantially fits the cross-section ofthe opening C in the center of the ball, but does not eX upper portionof the ball against distortion under strain, the life of the ball isextended.

The advantages of using the described.

arrangement may also be, at least in part, availed of where the ball orbody A is of difi erent composition from that shown. For example, it maybe a solid block of hard rubber or other material suitable foreflectinga tight closure of the valve.

hat I claim is 1. A valve including, in combination, a seat, a ball, aholder, and yielding means for pressing said holder and ball toward thevalve seat.

2. A safety valve including, in combination, a seat, an elastic ballconstituting the valve body, a holder, and a spring arranged -tonormally press the holder and ball toward said seat with :a yieldingpressure.

3. A valve including, in combination, a valve seat, an elastic body, aninner holder engaging said body and pressing the same against said seat,an outer holder which is adjustable toward the valve seat, and a. springtransmitting the adjustment of said outer holder to said inner holder.

4. A valve including, in combination, a valve seat, an elastic body, anlnner holder engaging said body and pressing the same against the valveseat, an outer holder which is ad ustable toward the valve seat, asprlng [transmitting the adjustment of said outer holder to said innerholder, and means for limiting the adjustment of the outer holder towardthe valve seat.

5. valve including, in combination, a valve seat, a yielding body, aninnerrholder G adapted to press said body against its seat, an outerholder H having .a guiding socket J in. which said inner holder movesand having a hollow portion L, a SpId-Ilg M in said hollow porti- E11bearing against :the

member G, and means for adjusting said .outer holder H toward the valveseat.

6. A valve including, in combination, a valve seat, van elastic ball,and a holder en gaging and pressing said ball against said seat, saidholder having a pro ection Lentering sald body, and said holder andprojection fitting close against the upper part of said body so as toprevent distortion thereof under pressure.

In witness whereof, I have hereunto signed my name 1n the presence oftwo subscribing witnesses.

EDl/VARD- E. GQLD.

Witnesses:

DOMINGO A. USINA, F RED WHITE.

